The Soviet Union’s means of cutting off Eastern Europe from the rest of the world and turning them communist.
The correct answer is A. When California applied for statehood, the Southern states feared that they would lose equality in the Senate. Before the admission of California, Southern slavist states and Northern free states had the same number of Senators. But when California was admitted in 1850, it entered into the Union as a free state, so it created a power disbalance for the Southern states, giving to extra votes to the abolitionist states.
Lots of civil wars and the invasions of barbarians like the huns and other tribes brought down the empire since the senator could not get along and refused to fix the problem.
This is what you’re looking for I think. Hope this helped.
